The calibration of the O/H abundance indicators for extragalactic H II regions based on O II recombination lines

M. Peimbert*, A. Peimbert, C. Esteban, J. García-Rojas, F. Bresolin, L. Carigi, M. T. Ruiz, A. R. López-Sánchez

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

36 Citations (Scopus)

Abstract

Based on O II recombination lines we present a new calibration (called O II RL) of Pagel's 023 indicator to determine the O/H abundance ratio in extragalactic H II regions and emission line galaxies. The O II RL calibration produces O/H abundances about a factor of two higher than those derived from the T(4363) method with t2 = 0.00. The O II RL calibration has implications for the study of different properties of emission line galaxies such as their metallicity, star formation rate, and initial mass function. The O II RL calibration also affects the abundance determinations based on other O/H indicators, that include collisionally excited lines, like those known as O3N2, N2, S23, Ar3O3, and S 3O3. We argue that the controversy between the T(4363) method and the photoionization models method to derive O/H values is mainly due to temperature variations inside the observed H Il regions.

Original languageEnglish
Title of host publicationFirst Light Science with the GTC
Place of PublicationMéxico, D.F.
PublisherInstituto de Astronomía, Universidad Nacional Autónoma de México
Pages72-79
Number of pages8
Volume29
ISBN (Print)9703232744, 9789703232741
Publication statusPublished - Jun 2007
Externally publishedYes
EventFirst Light Science with the GTC - Miami, FL, United States
Duration: 28 Jun 200630 Jun 2006

Other

OtherFirst Light Science with the GTC
CountryUnited States
CityMiami, FL
Period28/06/0630/06/06

Keywords

  • Galaxies: abundances
  • H II regions

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